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L.P.J.V'.KJOER.

ARM SUPPORT FOR DBNTISTS.

No. 602,084 Patented Apr. 12, 1898.

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. ATENT ARM-SUPPORT FOR DENTISTS.

SPECIFICATION forming part of Letters Patent No. 602,084, dated April12, 1898. Application filed July 10, 1897. Serial No. 644,069. (Nomodel.)

To all whom it may concern.-

Be it known that I, LAURITZ PETER JENSEN VORSLUND KJOER, of Copenhagen,Denmark, have invented a new and useful Arm-Support for Dentists, ofwhich the following is a specification.

In performing dental operations, especially when filling or stoppingteeth, the dentist is often obliged or required to stand for a long timebent over the patient. Such a position is very straining and prejudicialto health, as in it the dentist has no proper support for the upper.partof his body.

The object of this invention is to provide apparatusadapted to fill thiswant and to give the dentist, first, a support for his right arm,(movements of his hand necessary for the performance of the operationthereby gaining considerable in accuracy,) and, second, a support forhis left arm or hand behind the head of the patient.

In the drawings, Figure l is a side View, and Fig. 2 isa plan View, ofthe apparatus.

The apparatus consists of a cylindrical rod- 0;, to be fixed in a socketon the back of a chair in such a manner that it follows the movements ofthe chair. This rod is fixed in different appropriate heights by meansof a ring I), provided with a thumbscrew. The ring I) is adapted to reston top of the side walls of the socket or in lieu thereof to be securedto the back of the chair. In ahole or opening cut through the upper endof the rod is placed a rod or lever c, pivoted as at d. This rod 0 isbent, as shown in the drawings, and on its lower end carries a plate e,to which a cushion f may be adapted. The plate 6 can be moved around itsown center as an axis or pivot. The upper end of the lover or rod 0carries a rod g, movable around its bent end, which fits in a socket onthe upper end of the rod 0. On the other end the rod g is provided witha plate It, provided with a cushion 7o. The'plateh may be moved aroundits own center like the plate 6. .The lever cis adapted to be held indifferent positions by means of a segmental rack-bar forked and pivotedto the part c and having its teeth adapted for engagement with asuitable projection on the part a.

Having thus described thenature and objects of my invention, what Iclaim as new, and desire to secure by Letters Patent, is-

1. An arm-support for dentists comprising the combination of a rod a,adapted for application to a dental chair, a bent and pivoted rodconstituting an arm-support, and a segmental rack bar interposed betweensaid arms, substantially as described, for adj usting said parts.

2. An arm-supportfor dentists comprising the combination of a rod (1,, aclamping-ring b, a bent rod pivoted to the rod a, and havingarm-supports at its ends, and a segmental rack-bar interposed betweensaid rods, substantially as described.

3. In combination a rod, as a, a bent rod pivoted to the rod a, andprovided at one end with an arm-support, and a third bent rod pivoted tothe other end of the second rod and provided with an arm-support,substantially as described.

In testimony whereof I have hereunto signed my name.

I LAURITZ PETER JENSEN VORSLUND KJOER.

In presence of- JULEs BLoM, J. E. MIERS.

